No spark?

It sounds like the ignition module or ignition pick up is bad, Have you check the fuses? This guide can help:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

If your 1986 Oldsmobile Calais is not producing spark, there are a few potential causes to consider:

Ignition Coil: The ignition coil is responsible for generating the high voltage needed for the spark plugs to ignite the fuel mixture. A faulty ignition coil can result in no spark. You can test the coil using an ignition tester or a multimeter to see if it is producing the required voltage.

Distributor Cap and Rotor: The distributor cap and rotor distribute the electrical current from the ignition coil to the spark plugs. Over time, they can wear out or develop cracks, which can cause a loss of spark. Inspect the cap and rotor for any signs of damage or excessive wear.

Ignition Control Module: The ignition control module controls the timing and firing of the ignition system. A malfunctioning module can lead to a lack of spark. Testing the module can be done using specialized equipment or by replacing it with a known working unit to see if the issue is resolved.

Ignition Switch: The ignition switch sends power to various components of the ignition system, including the coil and control module. A faulty ignition switch can disrupt the flow of electricity and result in no spark. Check if the switch is functioning correctly.

Wiring and Connections: Inspect the wiring and connections related to the ignition system. Look for loose or damaged wires, corroded connections, or any other issues that may interrupt the electrical flow.

Please go over these guides and get back to us.